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Using Visual Studio 2005 As per the title; MSDN and google can't tell me, I'm hoping it'll let me know if the contained string contains Unicode characters or not - but that's a different problem!

+1  A: 

I used traits for custom defined comparison function.eg Currently default comparison implementation of two CStrings is case insensitive. If you want to do case sensitive comparison between two strings then you can define that behavior in traits.

I am not sure if there are any other use cases.

Alien01